Risk | Medium |
Patch available | NO |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-4217 |
CWE-ID | CWE-476 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
UnZip Client/Desktop applications / Software for archiving |
Vendor | Info-ZIP |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU68298
Risk: Medium
CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-4217
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in unzip when handling Unicode strings. A remote attacker can trick the victim to open a specially crafted archive and perform a denial of service (DoS) attack.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsUnZip: 5.2 - 6.10c22
External linkshttp://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077
http://bugzilla.redhat.com/show_bug.cgi?id=2044583
http://access.redhat.com/security/cve/CVE-2021-4217
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to open a a specially crafted archive.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.